package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper,Category> implements CategoryService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void remove(Long id) {


        // 判断当前分类是否存在菜单
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(Dish::getCategoryId,id);

        Integer dishCount = dishMapper.selectCount(lambdaQueryWrapper);

        //如果存在就报错
         if (dishCount>0){
             throw  new CustomException("当前分类下关联菜品，不能直接删除");
         }
        //判断分类下是否存在套餐
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
         setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        Integer setmealCount = setmealMapper.selectCount(setmealLambdaQueryWrapper);

        //存在就报错
         if (setmealCount>0){
             throw  new CustomException("当前分类下关联套餐，不能直接删除");
         }
        //删除
        this.removeById(id);
    }
}
